CN203826223U - Large power long life power film capacitor - Google Patents
Large power long life power film capacitor Download PDFInfo
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- CN203826223U CN203826223U CN201420165269.0U CN201420165269U CN203826223U CN 203826223 U CN203826223 U CN 203826223U CN 201420165269 U CN201420165269 U CN 201420165269U CN 203826223 U CN203826223 U CN 203826223U
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- capacitor
- shell
- long life
- large power
- encrustation
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Abstract
The utility model discloses a large power long life power film capacitor which comprises a shell, a capacitor core, a group of conductive soldering lugs, and two groups of electrodes. High temperature resistant epoxy potting material is filled in the cavity of the shell. The capacitor core is provided with an OPP base film. One side of the capacitor core is provided with an S-shaped cutting edge. The OPP base film is provided with a blank area and a high temperature resistant plating area with high conductivity. The plating area is provided with a plurality of T-shaped isolation areas which are connected with the blank area. According to the large power long life power film capacitor, problems of low safety factor, poor explosion-proof performance and short service life of an existing film capacitor can be effectively solved, and the film capacitor of the utility model has good high temperature resistance and pressure resistance effects and can be widely used in the field of film capacitors.
Description
Technical field
The utility model relates to a kind of large power long life-span dynamic encrustation capacitor.
Background technology
At present along with the adjustment of world energy sources structure, power power device (IGBT) is used widely as solar energy, wind energy, frequency converter, electric automobile etc., and the capacitor as DC-Link filtering buffering corresponding with it is to aobvious very important of whole system.Capacitor the key technical indexes in application is safety, long-life, high-power, high temperature resistant now.It is low that existing film capacitor exists coefficient of safety, and explosion-proof performance is poor, the problem that useful life is short, simultaneously withstand voltage and resistant to elevated temperatures poor effect.
Utility model content
The purpose of this utility model is to provide a kind of large power long life-span dynamic encrustation capacitor, solves existing film capacitor coefficient of safety low, and explosion-proof performance is poor, the problem that useful life is short.
It is a kind of large power long life-span dynamic encrustation capacitor that the utility model solves the technical scheme that its technical problem adopts, comprise the shell with cavity, be arranged on the some capacitor bodies in shell cavity, for connecting one group of conduction weld tabs of each capacitor body, on described shell, be provided with the two arrays of electrodes of drawing on self-conductance electric welding strip, in described shell cavity, be filled with fire resistant epoxy potting compound, described capacitor body comprises OPP basement membrane, and described OPP basement membrane one side is provided with the trimming of S type; On described OPP basement membrane, be provided with the high temperature resistant coating district of clear area and high conductivity; In described coating district, be provided with the T shape isolated area that several and clear area join.
In order to reduce self-healing energy consumption, reduce the contact resistance of lead-out wire and electrode, improve the ability of loaded current, the S type trimming side of the thickness self-capacitance device fuse in described coating district is trapezoidal to clear area successively decreases, and sheet resistance increases progressively gradually.
Further improve product explosion-proof performance, better realize high-power resistance to large electric current lower calorific value simultaneously, described T shape isolated area in the same way, equidistantly, be inclined in coating district.
In order to improve electric conductivity, when reaching the performance that improves product, reduce the quantity of heat production of product, the coating in described coating district is silver, zinc, aluminium composite deposite.
In order to increase the surface area of shell, improve the heat dispersion of product, described shell is rectangle, its outer surface is provided with one group of fin.
Preferably, described fin is set in qually spaced in the outer surface of shell, and its surface area be case surface long-pending 30%～60%.
For reliability and the saving installing space of enhancing product performance, described capacitor body is the capacitor body that shaftless, noninductive coiling forms; Described two arrays of electrodes self-conductance electric welding strip extension forms, and is positioned at homonymy or the heteropleural of shell.
In order to ensure the insulation property of product, in described shell cavity, be provided with insulating case, described capacitor body is arranged in insulating case.
The beneficial effects of the utility model: adopt the trimming of " S " type can increase the contact-making surface of product metal spraying, increase the now area between the interior electrode of unit volume and film, improve the attached outstanding power of electrode, reduce the contact resistance between electrode and film, thereby reduce the generation of heat, improve voltage endurance capability, extended useful life.The resistant to elevated temperatures coating district of high conductivity, has improved electric conductivity and the heat resistance of product; In coating district, be provided with the T shape isolated area that several and clear area join, can play buffer action, realize explosion prevention function, the highest 130 degree of " focus " temperature, realize high-power resistance to large electric current lower calorific value simultaneously, make the safe class of product reach P2, compare in existing design common netted, can there is not netted more easily interacting in the time having any to puncture and cause the problem that capacity attenuation is large, increase the useful life of product.The S type trimming side of the thickness self-capacitance device fuse of coating district coating is trapezoidal to clear area and successively decreases, and sheet resistance increases progressively gradually, trapezoidal the seamlessly transitting of coating can be stablized realization reduction self-healing energy consumption, reduces the contact resistance of lead-out wire and electrode, improve the ability of loaded current, voltage endurance capability.T shape isolated area in the same way, equidistantly, horizontal tilt certain angle is arranged in trapezoidal coating district, further improves product explosion-proof performance.Coating in coating district is silver, zinc, aluminium composite deposite, further improves product electric conductivity, in enhancing product performance, reduces the self-heating amount of product, reduces self-healing energy consumption.Adopt finned rectangular enclosure to increase by 30%～60% area of dissipation than common plane housing, be " focus " temperature of capacitor under equal conditions 7～9 degree (being that 15 degree calculate by ambient temperature and the focus temperature difference) that declined, the theoretical life-span will extend one times (more than 100000H).Increase by 30%～60% area of dissipation simultaneously, in housing has enough area of dissipations, save production cost having ensured, and improve the reasonable structure of product.Capacitor body adopts, noninductive winding method is made; Two arrays of electrodes homonymy or heteropleural that copper bar weld tabs is drawn, realized low ESR, low inductance (≤20nH) thus greatly reduce the voltage stress of power switch (IGBT), improve its functional reliability, realize the mounting means of " power P CB " simultaneously, save installing space, particularly important to electric automobile or power vehicle.The setting of insulating case, has further strengthened the insulation property of the technical program, has improved the Performance And Reliability of product.
The utility model can effectively solve that existing film capacitor coefficient of safety is low, and explosion-proof performance is poor, the problem that useful life is short, and withstand voltage, high-temperature resistant result good, can be widely used in film capacitor field.
Below with reference to drawings and Examples, the utility model is described in detail.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is vertical view of the present utility model.
Fig. 3 is the front view in coating district on OPP basement membrane.
Fig. 4 is the structural representation of capacitor body.
Embodiment
Embodiment 1, a kind of large power long life-span dynamic encrustation capacitor as shown in Figures 1 to 4, comprise the shell 1 with cavity, be arranged on the some capacitor bodies 4 in shell 1 cavity, for connecting one group of conduction weld tabs 5 of each capacitor body 4, on described shell 1, be provided with the two arrays of electrodes 6 of drawing on self-conductance electric welding strip 5, in described shell 1 cavity, be filled with fire resistant epoxy potting compound 3, described capacitor body 4 comprises OPP basement membrane 8, and described OPP basement membrane 8 one sides are provided with S type trimming 11; On described OPP basement membrane 8, be provided with the high temperature resistant coating district 9 of clear area 12 and high conductivity; The S type trimming side of the thickness self-capacitance device fuse 4 of described coating district 9 coating is trapezoidal to clear area 12 successively decreases, and sheet resistance increases progressively gradually; In described coating district 9, be provided with the T shape isolated area 10 that several and clear area 12 join.Described T shape isolated area 10 in the same way, equidistantly, be inclined in trapezoidal coating district 9.Coating in described coating district 9 is silver, zinc, aluminium composite deposite.
Above-mentioned large power long life-span dynamic encrustation capacitor case 1 is rectangle, and its outer surface is provided with one group of fin 7.Described fin 7 is set in qually spaced in the outer surface of shell 1, and its surface area is 30%～60% of shell 1 surface area.The capacitor body that described capacitor body 4 forms for shaftless, noninductive coiling; Described two arrays of electrodes self-conductance electric welding strip 5 extensions form, and are positioned at homonymy or the heteropleural of shell 1.In described shell 1 cavity, be provided with insulating case 2, described capacitor body 4 is arranged in insulating case 2.
In " S " type trimming of giving capacitor body, when metal spraying region 13 metal spraying as shown in Figure 1, adopt zinc, tin, aluminium composite material to carry out metal spraying, the pure zinc metal spraying of comparing so existing technique has advantages of low melting point, make firm welding degree larger, the connection better effects if of product, and in metal spraying process, to " S " type, trimming can not cause damage.Giving when capacitor body metal spraying, wherein when one side, easily there is turbulent flow and negative pressure appearance, thereby cause the another side of capacitor body to be polluted in metal spraying.For fear of this problem, in the technical program, in metal spraying wherein when one side, adopt a special fixture with cavity to isolate other one side, thereby avoid in metal spraying process polluting because of turbulent flow and negative pressure the phenomenon of other one side.Being shaped as in cone of special fixture has capacitor core group location-plate, and what such shape design can be best reaches above-mentioned isolation effect.
Claims (8)
1. a large power long life-span dynamic encrustation capacitor, comprise the shell (1) with cavity, be arranged on the some capacitor bodies (4) in shell (1) cavity, be used for connecting one group of conduction weld tabs (5) of each capacitor body (4), on described shell (1), be provided with the two arrays of electrodes (6) of drawing on self-conductance electric welding strip (5), in described shell (1) cavity, be filled with fire resistant epoxy potting compound (3), described capacitor body (4) comprises OPP basement membrane (8), and described OPP basement membrane (8) one sides are provided with S type trimming (11); It is characterized in that: the high temperature resistant coating district (9) that is provided with clear area (12) and high conductivity on described OPP basement membrane (8); In described coating district (9), be provided with the T shape isolated area (10) that several and clear area (12) join.
2. large power long life-span dynamic encrustation capacitor according to claim 1, is characterized in that: to clear area, (12) are trapezoidal and successively decrease the S type trimming side of the thickness self-capacitance device fuse (4) in described coating district (9), and sheet resistance increases progressively gradually.
3. large power long life-span dynamic encrustation capacitor according to claim 1 and 2, is characterized in that: described T shape isolated area (10) in the same way, equidistantly, be inclined in coating district (9).
4. large power long life-span dynamic encrustation capacitor according to claim 3, is characterized in that: the coating in described coating district (9) is silver, zinc, aluminium composite deposite.
5. large power long life-span dynamic encrustation capacitor according to claim 4, is characterized in that: described shell (1) is rectangle, and its outer surface is provided with one group of fin (7).
6. large power long life-span dynamic encrustation capacitor according to claim 5, is characterized in that: described fin (7) is set in qually spaced in the outer surface of shell (1), and its surface area is 30%～60% of shell (1) surface area.
7. large power long life-span dynamic encrustation capacitor according to claim 6, is characterized in that: the capacitor body that described capacitor body (4) forms for shaftless, noninductive coiling; Described two arrays of electrodes self-conductance electric welding strip (5) extension forms, and is positioned at homonymy or the heteropleural of shell (1).
8. large power long life-span dynamic encrustation capacitor according to claim 7, is characterized in that: in described shell (1) cavity, be provided with insulating case (2), described capacitor body (4) is arranged in insulating case (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420165269.0U CN203826223U (en) | 2014-04-04 | 2014-04-04 | Large power long life power film capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420165269.0U CN203826223U (en) | 2014-04-04 | 2014-04-04 | Large power long life power film capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203826223U true CN203826223U (en) | 2014-09-10 |
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ID=51481695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420165269.0U Expired - Fee Related CN203826223U (en) | 2014-04-04 | 2014-04-04 | Large power long life power film capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203826223U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871743A (en) * | 2014-04-04 | 2014-06-18 | 黄山申格电子科技有限公司 | Power thin film capacitor high in power and long in service life |
-
2014
- 2014-04-04 CN CN201420165269.0U patent/CN203826223U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871743A (en) * | 2014-04-04 | 2014-06-18 | 黄山申格电子科技有限公司 | Power thin film capacitor high in power and long in service life |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20170404 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |